Results 161 to 170 of about 11,828 (208)

Mechanism of oxidative coupling of coniferyl alcohol

Phytochemistry, 1994
Abstract The dimerization mechanism of coniferyl alcohol in aqueous and non-aqueous media has been investigated by electrochemistry and by radiolysis. The coniferyl radical has been observed and shown to dimerize by a radical-radical coupling.
Philippe Hapiot, Jean Pinson, P Neta
exaly   +2 more sources

Kinetic study on the heterogeneous degradation of coniferyl alcohol by OH radicals

Chemosphere, 2020
Coniferyl alcohol derived from lignin pyrolysis, is a potential tracer for wood burning emissions, but its atmospheric stability toward OH radicals is not well known. In this work, the degradation kinetics of coniferyl alcohol by OH radicals was studied using a flow reactor at different OH concentrations, temperatures, and relative humidity (RH).
Changgeng Liu
exaly   +3 more sources

Coniferyl alcohol metabolism in conifers — II. Coniferyl alcohol and dihydroconiferyl alcohol biosynthesis

Phytochemistry, 2001
Coniferaldehyde and NADPH when incubated with microsomes isolated from developing xylem of Pinus strobus yielded coniferyl alcohol and dihydroconiferyl alcohol in vitro. D-(+)-Pinitol was also found to be a microsomal constituent. Endogenous E-coniferyl alcohol content, quantified in dormant buds, cambium, bark and needles of Pinus resinosa and P ...
R A, Savidge, H, Förster
openaire   +2 more sources

Simplified Preparation of Coniferyl and Sinapyl Alcohols

Journal of Agricultural and Food Chemistry, 2005
Coniferyl and sinapyl alcohols were prepared from commercially available coniferaldehyde and sinapaldehyde using borohydride exchange resin in methanol. This reduction is highly regioselective and exceptionally simple, making these valuable monolignols readily available to researchers lacking synthetic chemistry expertise.
Hoon, Kim, John, Ralph
openaire   +2 more sources

Enzymatic Polymerization of Coniferyl Alcohol in the Presence of Cyclodextrins

Biomacromolecules, 2006
The dehydrogenative polymerization of coniferyl alcohol by horseradish peroxidase was performed in 0.10 M phosphate buffer at 27 degrees C. Dehydrogenative polymer (DHP) from coniferyl alcohol was characterized by size exclusion chromatography (SEC) and nuclear magnetic resonance (NMR) spectroscopy. The ratio of 8-O-4':8-5':8-8' linkages was determined
Rikiya, Nakamura, Yasuyuki, Matsushita, Kazuhiko, Umemoto, Arimitsu, Usuki, Kazuhiko, Fukushima   +4 more
openaire   +2 more sources

Coniferyl alcohol oxidase ? a catechol oxidase?

Trees, 1995
The physico-chemical properties of coniferyl alcohol oxidase (CAO), a copper containing glycoprotein spatiotemporally associated with lignification in conifers, is reported here. By electron paramagnetic resonance spectroscopy, only type 3 copper was indicated in CAO. CAO oxidizes several laccase substrates; however, it is not a blue-copper protein and
PreethiV. Udagama-Randeniya, RodneyA. Savidge   +1 more
openaire   +1 more source

Free radicals of coniferyl alcohol and isoeugenol

Australian Journal of Chemistry, 1975
E.s.r, spectra have been obtained from the free radicals formed by photolysis of coniferyl alcohol and isoeugenol in low temperature ice matrices. Analysis of these spectra indicates that the unpaired electrons are delocalized over the entire radicals and the spin densities at the β carbon atoms are about a third of an electron.
GJ Smith, IJ Miller
openaire   +1 more source

Bacterial degradation of dehydropolymers of coniferyl alcohol

Archives of Microbiology, 1984
A bacterial isolate identified as Xanthomonas sp. proved to be ligninolytic due to its ability to degrade 14C-labeled dehydropolymers of coniferyl alcohol (DHP) and [14C]lignocellulose complexes from corn plants (Zea mays). Several parameters of ligninolysis were evaluated and it was shown that resting cells degrade DHP as sole carbon source ...
openaire   +2 more sources

Flash photolysis of coniferyl alcohol

Journal of the Chemical Society D: Chemical Communications, 1971
Flash photolysis of coniferyl alcohol gives rise to a long-lived transient assigned a quinone methide structure.
openaire   +1 more source

Study of Photochemical Reactions of Coniferyl Alcohol. II. Comparative Structural Study of a Photochemical and Enzymatic Polymer of Coniferyl Alcohol

Photochemistry and Photobiology, 1998
AbstractThe structure of the polymer synthesized by UV irradiation of coniferyl alcohol was studied, using UV‐visible, Raman, IR, H‐NMR and 13C‐NMR spectroscopy. The photochemical polymer was compared with the structure of the polymer obtained by peroxidase‐catalyzed polymerization of coniferyl alcohol.
Ksenija Radotic, Smilja Todorovic, Joanna Zakrzewska, Milorad Jeremic   +3 more
openaire   +1 more source